Intrastat declaration for STO - additionally items MVT 603/605

Hi

We have scenario with STO where we add some additionally items into outbound delivery from supplying plant using movement type 603 (w/o PO) and from receiving plant we use inbound delivery with movement type 605. Unfortunatelly additionally items are not shown in the intastat declaration (tcode VX99) because there are w/o reference to UB order.

Is there any way to add these items into intrastat automatically ??

I know than I can do it manually using VEFU but we have a lot of deliveries every day ..........

I have already tried user exits EXIT_SAPLV50G_001 and EXIT_SAPLV50G_002 and I can exclude some items but not add/select new items.